Benedormiens Castle, the origin of the village of Castell d'Aro, is first documented in the year 1041, when the religious authorities, nobles and knights of the territory gave the monastery of Sant Feliu de Guíxols the custody of the castle with the ' obligation to protect the whole of the Vall d'Aro from Muslim attacks.
The village grew up around the castle, while the more distant farmhouses were fortified and defensive towers were built. In 1462, the castle was set on fire during the Remenses war. An accidental explosion destroyed the fortress in 1879. In 1970, the Town Council, owner of the castle, commissioned the first restoration. The oldest part of the castle, dating from the 12th century and closest to the church, was preserved. In 1983, the rooms of the castle were fitted out for exhibitions.
In 1995, the old quarter of Castell d'Aro (made up of the streets of Carme, Hospital, Castell, Sol and Major; the parish church of Santa Maria, the square of the same name, and the Benedormiens Castle itself) was officially declared a "Cultural Asset of National Interest" by the Generalitat de Catalunya.